John eitohie



:(Nogmodel.)

A J. RITCH'IE.

l SJMQKE BURNING PUBNAGB. Nq'. 271,989. Patented Feb-.6,1a8s.

HEM.,

. HGM;

JAY

Wwmaa I y NNWNWN /f /myn pering flues UNITED STATES PATENT OFFICE.

JOHN EITGHIE, OE oHIoAGO, ILLINOIS, AssIGNoE To JOHN N. MANNING AND GEORGE MEHR-ING, OE sAME `PLAGE.

SPEClFIGATION forming part of Letters Patent No. 271,989, dated February 6, 1883.

Application filed July 22, 1882. (No model.)

To all whom it may concern Be it known that I, JOHN RITGHIE, of Chicago, in the county of Cook and State ofIllinois, have invented new and useful Improvements in Steam-Boiler Furnaces, of which the following is a specifioation,rcference being had to the accompanying drawings, illustrating the invention, in which- Figure l isa longitudinal central sectional elevation of afurnace and elevation of a boiler embodying my improvement and invent-ion; Fig. 2, a horizontal section of the furnace, taken beneath the boiler and above the combustion pipes; Fig. 3, a front elevation of the furnace, with a portion thereof broken away to show the combustion-pipes. Fig. 4 is an end view of the pivoted door K. Fig. 5 is a side view of same andthe frame.

The object of the present invention is so to improve the ordinary steam-boiler furnace as to attain a better combustion in and back 'of the bridgewall, whereby the heat is more uniformly diffused and a uniform tempera-ture attained in the front and rear of the bridgewall.'

The nature of the invention consists in taplaced through a solid bridgewall. The rear or back ends of the lines are the smaller, and converge, so as to concentrate the iiames of the two ues in one flame at such a distance back 'of the bridge-Wall as to produce an intense heat `to keep up the temperature back of the bridge-wall. The object of the taper of the luesis to provide a greater combustion area at the front of the bridge-wall, where there is the greater amount of solid materials to be burned, and not to allow the said materials to fully escape from the action of the concentrated heat till that substance known as smoke 7 is reduced before escaping up the chimney.

A representsa steam-boiler.

1) is the solid bridge-wall.

G Gr represent two fines or combustion-pipes, which are made of fire-clay or similar material, with theirrear or back ends smaller than their induction ends at the front of the bridge-wall, and the narrower ends are inclined toward each other', so as to direct the two iiames coining from them into one llame to concentrate an intense heat for the purpose stated. The degree of taper given to the lines must depend somewhat on the force of the draft; the greater the draft thev greater the taper should be and the closer the smaller ends of the dues I should be set to each other. The cold air is brought to the uesby means of ports F and a series of perforations extending round the under portion of the ilues.

B is the tire-box, and K the damper in the door.

. I am aware that a single ue of equal area at the front and back end hasbeen placed lin a bridge-wall, and that a series of such ues have been employed in the same place. I therefore confine and limit niy invention to the tapered ilues and to their rear converging position.

I am aware that tapered tlues without air ports in them have been used, and that fines have been made to converge at their rear ends. I therefore confine myself to the combination and construction specifically' set out in the claim.

I claim as my invention- In steam-boiler furnacesin which the bridgewall incloses the space below the boiler, the two dues G G, formed of truncated cones, with their smaller ends converged and projected to the back of thebridge-wall, the said fines pro` vided each witha series of air-ports extending' for more than half round their under sides, to concentrate the flames therein centrally toward the upper portions of the hues, and tapered to bring together` said concentrated llames at the rear of the bridge-wall, as specilied.

JOHN EITOHIE.

Witnesses:

G. L. GHAPIN, GEORGE MEHEING. 

